Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.233.85-3.94
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
{110} good
{010} Good, {100} Distinct
Mohs Hardness
5-65-5.5
2
10
👆🏻
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)